Solid hydrogen storage magnesium ingot and hydrogen storage equipment adopting same

Abstract

The utility model discloses a solid hydrogen storage magnesium ingot and hydrogen storage equipment adopting the same, and belongs to the field of hydrogen storage and transportation. The solid hydrogen storage magnesium ingot is provided with two main surfaces opposite to each other, and the minimum circumcircle diameters of the two main surfaces range from 6 cm to 25 cm. The thickness ranges from 1 cm to 5 cm; one or more through holes are formed between the two main surfaces, the one or more through holes comprise at least one main hole, and the area of the main hole accounts for 1%-25% of the total area of the main surface where the main hole is located. According to the solid hydrogen storage magnesium ingot, through the shape and size design, the abrasion degree of the magnesium ingot and a container can be reduced in the transportation process, and the loss of a hydrogen storage medium is reduced; the hydrogen release rate is high, the hydrogen charging rate is considered, and the operation efficiency can be improved; the hydrogen storage density is large, transportation is convenient and safe, and especially when a square cylinder is selected, the hydrogen storage density is maximum.

Description

Technical Field

[0001] The utility model relates to the field of hydrogen storage and transportation, in particular to a solid hydrogen storage magnesium ingot and a hydrogen storage device using the same. Background Art

[0002] In recent years, hydrogen, as a new type of clean energy, has received great attention from the country and has seen booming development. However, the problems of its storage and transportation have become important factors restricting the development of hydrogen energy. Solid-state hydrogen storage technology has been an important research direction in the field of hydrogen energy in the past two years. It has significant advantages over traditional high-pressure gaseous hydrogen storage and cryogenic liquid hydrogen storage in terms of safety, economy, hydrogen storage density, etc., and shows broad application potential especially in the fields of vehicle hydrogen energy, long-distance transportation, and large-scale energy storage.

[0003] Solid-state hydrogen storage technology stores hydrogen in solid materials through physical adsorption or chemical reactions. Compared with traditional high-pressure gaseous hydrogen storage and cryogenic liquid hydrogen storage methods, its significant advantages are reflected in the following aspects: (1) High hydrogen storage density: The hydrogen storage density of magnesium-based solid-state hydrogen storage materials can reach more than 6.4 wt%, and the capacity of a single hydrogen storage tank is as high as 1 ton, far higher than traditional hydrogen storage methods. (2) High safety: The stability of solid-state hydrogen storage materials enables them to store hydrogen safely at normal temperature and pressure, reducing the risks during transportation and use. (3) Good economy: It eliminates the complex compression or cryogenic process, reducing equipment costs and energy consumption. (4) Strong environmental adaptability: It has lower requirements for environmental temperature and pressure and is suitable for various application scenarios.

[0004] Due to these above advantages, solid-state hydrogen storage technology has become a current research hotspot. Especially magnesium-based solid-state hydrogen storage technology has entered the commercial application stage and achieved breakthroughs in multiple fields. However, as a highly potential hydrogen storage and transportation solution, although magnesium-based solid-state hydrogen storage technology has significant advantages in terms of safety, hydrogen storage density, and operation at normal temperature and pressure, it has not yet become the main means of transporting hydrogen by vehicle. The main reasons include the following aspects: (1) Vehicle-mounted hydrogen storage equipment needs to fully consider the impact resistance of hydrogen storage materials and equipment safety. Compared with fixed hydrogen storage equipment, hydrogen storage materials such as powders and small particles cannot be used because they are easily crushed by collisions, resulting in blockage of the gas transmission pipe and inducing accidents, or the loss of hydrogen storage substances due to being carried away by the gas flow; (2) Vehicle-mounted hydrogen storage equipment also needs to consider the convenience of hydrogen charging and discharging. Magnesium-based solid-state hydrogen storage materials (such as MgH2) reach a temperature of 300 °C and a pressure of 1-5 MPa during hydrogen charging, and need a high temperature above 300 °C when releasing hydrogen, which requires the storage and transportation equipment to be able to withstand high temperature and high pressure. (3) Vehicle-mounted hydrogen storage equipment needs to fully improve the transportation capacity. If magnesium-based solid-state hydrogen storage technology is used, it is required to store as much hydrogen as possible per unit volume, which contradicts the aforementioned point (1). As is well known in this field, the smaller the particle volume of magnesium-based solid-state hydrogen storage materials, the larger the surface area, the higher the hydrogen storage density, and the faster the hydrogen release rate.

[0005] In summary, in order to better improve the efficiency and safety of hydrogen transportation by vehicle, it is urgently necessary to develop a solid-state hydrogen storage magnesium ingot and equipment to at least partially solve the current defects and deficiencies. Summary of the Utility Model

[0006] In view of this, the main object of the present utility model is to provide a solid-state hydrogen storage magnesium ingot and a hydrogen storage device using the same, in order to at least partially solve the above technical problems.

[0007] To achieve the above object, as the first aspect of the present utility model, a solid-state hydrogen storage magnesium ingot is proposed, wherein:

[0008] It has two main surfaces opposite to each other, and the diameters of the minimum circumscribed circles of the two main surfaces are both in the range of 6 to 25 cm;

[0009] The thickness is in the range of 1 to 5 cm;

[0010] One or more through holes are formed between the two main surfaces, and at least one main hole is included in the one or more through holes, and the proportion of the area of the main hole in the total area of the main surface where it is located is 1% to 25%.

[0011] As the second aspect of the present utility model, a hydrogen storage device using the above-mentioned solid-state hydrogen storage magnesium ingot as a hydrogen storage medium is also proposed.

[0012] Based on the above technical solutions, the solid-state hydrogen storage magnesium ingot of the present utility model, compared with the prior art, has at least one of the following beneficial effects:

[0013] 1. Through the shape and size design, the static friction coefficient between the solid-state hydrogen storage magnesium ingots of the present utility model and between them and the buffer elements is high, which can reduce the relative displacement and collision of the materials during transportation, thereby reducing the degree of wear, avoiding the loss of the hydrogen storage medium, and improving the durability of the materials;

[0014] 2. Through the shape and size design, in cooperation with the corresponding tank design, the hydrogen release rate of the solid-state hydrogen storage magnesium ingot of the present utility model is fast, and the hydrogen charging rate is also taken into account, which can improve the operation efficiency;

[0015] 3. Through the shape and size design, in cooperation with the corresponding tank design, the solid-state hydrogen storage magnesium ingot of the present utility model has a large hydrogen storage density, which is convenient for safe transportation. Especially when a square prism is selected, the hydrogen storage density is the largest. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below.

[0017] Figure 1 is a structural perspective view of the hydrogen storage device of the present utility model loaded with solid hydrogen storage magnesium ingots;

[0018] Figure 2 is a three-dimensional view of the solid hydrogen storage magnesium ingots of an embodiment of the present utility model;

[0019] Figure 3 is a three-dimensional view of the solid hydrogen storage magnesium ingots of another embodiment of the present utility model.

[0020] In the above-mentioned drawings, the meanings of the reference numerals are as follows:

[0021] 1 - solid hydrogen storage magnesium ingot; 2 - through hole; 3 - limit air guide rod; 4 - air outlet hole; 5 - buffer element; 6 - cavity. Specific Embodiments

[0022] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the following further elaborates on the present utility model in detail with reference to specific embodiments and the accompanying drawings.

[0023] The terms used in the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present utility model. The singular forms of "a", "the" and "said" used in the embodiments of the present utility model and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0024] In the present utility model, the meanings of some terms are as follows:

[0025] The main surface refers to the most important surface among the various surfaces of a three-dimensional structure, usually the surface with the largest area or the one that best reflects the characteristics or functions of the three-dimensional structure.

[0026] The geometric diameter (Geometric Diameter) generally refers to the maximum width of an irregular shape, that is, the maximum distance between any two points inside the shape. For example, for a convex closed curve, the diameter can be defined by measuring the maximum distance between two points inside the figure.

[0027] The minimal circumscribed circle diameter (Minimal Circumscribed Circle Diameter) represents the diameter of a shape by finding the smallest circle that can completely enclose the irregular shape and using the diameter of this circle.

[0028] The aspect ratio is the ratio of the height to the minimal circumscribed circle diameter of the surface in the vertical height direction, that is, the ratio of the height to the diameter.

[0029] In the present utility model, for convenience of description, two opposite main surfaces are both arranged on the X-Y plane, and the maximum distance between the two main surfaces, i.e., the thickness, is arranged in the Z-axis direction. Thus, these two main surfaces are simply referred to as the upper and lower surfaces, and the other surfaces surrounding the two main surfaces are simply referred to as the side surfaces.

[0030] At present, the solid-state hydrogen storage technology has developed rapidly and has excellent performance in both fixed hydrogen storage equipment and hydrogen production equipment. However, for hydrogen storage equipment used in vehicle transportation, at present, high-pressure gaseous or liquid hydrogen storage equipment is still the main type. After careful analysis of the deficiencies of the existing technology by the present inventor and through in-depth research on theoretical calculations, simulation experiments, and experimental tests, it is found that by defining a specific shape for the solid-state hydrogen storage magnesium ingot and cooperating with a specific hydrogen storage tank design, the safety of hydrogen transportation can be solved, and the problems of rapid hydrogen charging and hydrogen release can also be solved. This solution does not require improvement of the material of the solid-state hydrogen storage magnesium ingot, and the materials available on the market at present are all applicable to this solution. The present utility model is not related to the improvement and protection of materials.

[0031] Thus, as Figure 2 , 3 shown, the present utility model proposes a solid-state hydrogen storage magnesium ingot, which has the following characteristics:

[0032] The solid-state hydrogen storage magnesium ingot has two opposite main surfaces. The two main surfaces include an upper surface and a lower surface, and their areas can be the same or different, but both meet the following diameter size requirements. As Figure 2 shown, it is a square main surface, and as Figure 3 shown, it is a circular main surface. For the other surfaces other than the main surfaces, the present utility model does not make specific limitations. For example, they can be multiple side surfaces of polygons, the entire circular arc side surface of a circular cylinder, or irregular shapes. From the perspective of facilitating processing and reducing damage to the inner wall of the container, the side surfaces are preferably the arc surfaces of (ellipsoidal) cylinders or the four rectangular surfaces of a cube.

[0033] Among them, the minimum circumscribed circle diameter of the two main surfaces of the solid-state hydrogen storage magnesium ingot is, for example, in the range of 6 - 25 cm; the purpose of setting the minimum circumscribed circle diameter is to limit the size of the solid-state hydrogen storage magnesium ingot. If it is too small, they are likely to collide and break with each other, resulting in powder clogging the gas pipeline or loss of effective hydrogen storage medium due to overflowing with the air flow; if it is too large, the risk of accidents may increase because the vehicle-mounted container may become a bomb when encountering a violent collision. The larger the hydrogen storage volume, the higher the risk of flash explosion and violent combustion explosion. After careful calculation, it is determined that the best effect is achieved when the minimum circumscribed circle diameter is 6 - 25 cm. Preferably, for the two main surfaces of the solid-state hydrogen storage magnesium ingot, its minimum circumscribed circle diameter is, for example, 6 - 20 cm, and more preferably 8 - 15 cm.

[0034] The thickness of the solid-state hydrogen storage magnesium ingot is, for example, 1 to 5 cm, which is obtained through careful calculation and simulation experiments. Preferably, the thickness of the solid-state hydrogen storage magnesium ingot is, for example, 1.5 to 4.5 cm, and more preferably, 2 to 4 cm.

[0035] One or more through-holes are formed between the two main surfaces of the solid-state magnesium hydrogen storage ingot. These through-holes can be used to penetrate a position-limiting gas guide rod or serve as an airflow channel, allowing hydrogen gas to directly reach the interior of the solid-state magnesium hydrogen storage ingot, reducing the hydrogen gas's penetration distance and improving hydrogen charging and discharging efficiency. The one or more through-holes include at least one main hole, the area of which accounts for 1% to 25% of the total area of the main surface in which it is located.

[0036] In which, one or more through holes or blind holes are formed in the radial direction of the at least one main hole, for example, to further direct the hydrogen gas flow transported by the limiting gas guide rod directly to the interior of the solid hydrogen storage magnesium ingot, thereby reducing the penetration distance of hydrogen and increasing the hydrogen charging and release rate.

[0037] The solid-state hydrogen storage magnesium ingots are, for example, vehicle-mounted (car or train transportation), ship-mounted (ship transportation) or airborne (aircraft transportation) solid-state hydrogen storage magnesium ingots, which can be transported in the form of stacks, in compliance with relevant transportation regulations.

[0038] At least one of the two main surfaces of the solid-state magnesium hydrogen storage ingot has an axially symmetrical, rotationally symmetrical, or centrally symmetrical shape, and the shapes of the upper and lower surfaces may be completely identical or slightly different. Preferably, the side surface of the solid-state magnesium hydrogen storage ingot is configured to be easily accommodated within the cavity of a hydrogen storage device.

[0039] The shapes of the two main surfaces of the solid-state hydrogen storage magnesium ingot are both selected from a regular polygon, a ring racetrack, a circle or an ellipse, with square and circle being preferred.

[0040] The aspect ratio of the solid-state magnesium ingot for hydrogen storage is, for example, in the range of 0.04 to 0.33, thereby ensuring the uniformity of the density of the solid-state magnesium ingot for hydrogen storage.

[0041] Among them, the specific material composition of the solid-state hydrogen storage magnesium ingot is not limited, and the present invention does not involve improvements in the specific material composition. It can be various existing magnesium elements or magnesium alloy materials with excellent performance, or it can be other existing solid-state hydrogen storage magnesium ingots doped with aluminum, nickel or rare earth, such as pure magnesium, transition metal-doped magnesium-based materials, Mg-Ni alloys, Mg-Ni-RE alloys, etc.

[0042] Among them, the two main surfaces of the solid hydrogen storage magnesium ingot are, for example, flat surfaces, or flat surfaces with concave-convex or wavy structures, so as to facilitate upper and lower engagement positioning and reduce left and right shaking. When the solid hydrogen storage magnesium ingots are stacked on top of each other, any outermost end abuts against the inner wall of the cavity through a buffer element, rather than each of the solid hydrogen storage magnesium ingots being connected through a buffer element, the solid hydrogen storage magnesium ingots are also required to be stacked axially up and down. Therefore, when the lower surface of a solid hydrogen storage magnesium ingot is wavy, the upper surface of the lower solid hydrogen storage magnesium ingot stacked on it needs to be a matching wavy shape, and it is not limited whether the lower surface of the lower solid hydrogen storage magnesium ingot stacked on it is wavy, as long as it matches the shape of the upper surface of the corresponding next lower solid hydrogen storage magnesium ingot.

[0043] Among them, the minimum circumscribed circle diameter of at least one main hole included in the one or more through holes 2 is in the range of 0.5 - 5 cm, or the area of the at least one main hole accounts for 1% - 25% of the total area of the main surface where it is located, and it can be penetrated through the limiting air guiding rod with an air outlet.

[0044] Among them, if there are multiple through holes 2, they are evenly distributed on the main surface, and the area covered around each through hole 2 (the area of hydrogen permeation) is preferably proportional to its aperture. For example, when the number is 5, they are distributed in the form of a plum blossom pile. When there are 5 through holes 2, where one in the middle has a large aperture and the four around have smaller apertures, the through hole 2 in the middle has a large covered area, and the four through holes 2 around are arranged closer to the edge and have a relatively small covered area.

[0045] During actual use, as Figure 1 shown, the solid hydrogen storage magnesium ingot 1 is, for example, accommodated in a hydrogen storage device, such as a solid hydrogen storage cylinder or a solid hydrogen storage tank. The hydrogen storage device includes:

[0046] A sealed outer shell, inside which a cavity 6 is formed;

[0047] Several limiting air guiding rods 3, arranged inside the cavity; a hydrogen delivery channel is formed inside the limiting air guiding rod 3, and several air outlet holes 4 are arranged on the surface, capable of delivering hydrogen into the interior of the solid hydrogen storage magnesium ingot 1 penetrated through it;

[0048] A hydrogen input / output interface, arranged on the sealed outer shell and communicated with the hydrogen delivery channel inside the limiting air guiding rod 3;

[0049] The solid-state hydrogen storage magnesium ingot 1 has two main surfaces opposite to each other. The diameters of the minimum circumscribed circles of the two main surfaces are both in the range of 6 to 25 cm. One or more through holes 2 are formed between the two main surfaces. Among them, each of the solid-state hydrogen storage magnesium ingots 1 is stacked and penetrated on the limiting air guide rod 3, and its displacement in the radial direction of the limiting air guide rod 3 is restricted by the limiting air guide rod 3. The bottom and top sides of the stacked solid-state hydrogen storage magnesium ingots 1 are abutted against the inner wall of the cavity 6 through the buffer elements 5, and a certain gap is formed between the side surfaces and the inner wall of the cavity 6.

[0050] Thus, the limiting air guide rod 3 can not only fix the solid-state hydrogen storage magnesium ingot 1 to prevent its radial and axial displacements, but also directly transport hydrogen into the interior of the solid-state hydrogen storage magnesium ingot 1 through the internal hydrogen delivery channel, thereby increasing the hydrogen charging and discharging rates.

[0051] Among them, the limiting air guide rod 3 can be, for example, multiple parallelly arranged ones, so that the entire hydrogen storage device is similar to a relatively fat large tank, that is, a solid-state hydrogen storage tank, or it can also be only one, located in the middle of the cavity, so that the entire hydrogen storage device is similar to a slender long tube, that is, a solid-state hydrogen storage tube.

[0052] Among them, the sealing outer shell is, for example, welded shut after loading the solid-state hydrogen storage magnesium ingot 1, thus forming a disposable container device; or an operation port for replacing the internal solid-state hydrogen storage magnesium ingot 1 can also be provided thereon, which not only ensures its sealing requirements but also enables the replacement of the inner core after it has been recycled several times (generally more than 1000 to 1500 times), extending the service life of the sealing outer shell.

[0053] Among them, the buffer element 5 is, for example, a spring or a deformable elastic material (such as metal foam, etc.), preferably a spring, because during the hydrogen release process, the entire hydrogen storage device needs to be heated to above 300 °C, and the deformable elastic material is prone to aging and failure when repeatedly heated.

[0054] Among them, the hydrogen storage device can be fixed or mobile, but preferably mobile, especially vehicle-mounted, such as a vehicle-mounted hydrogen storage tube or a vehicle-mounted hydrogen storage tank. These vehicle-mounted hydrogen storage tubes or vehicle-mounted hydrogen storage tanks can be loaded onto freight trucks or trains through special shelves, thereby achieving batch and efficient transportation.

[0055] Among them, the solid-state hydrogen storage magnesium ingot 1 as described above can be prepared, for example, by the following method:

[0056] Form the solid-state hydrogen storage magnesium ingot 1 with the shape and structure of the present utility model, and form one or more through holes 2 on its main surface by drilling or etching; or

[0057] Prepare the solid-state hydrogen storage magnesium ingot 1 with the shape and structure of the present utility model using a mold capable of forming one or more through holes 2 on the main surface.

[0058] However, the present utility model does not protect the relevant preparation methods.

[0059] The present utility model also provides a hydrogen storage device that uses the solid-state hydrogen storage magnesium ingot 1 as described above as a hydrogen storage medium, such as a hydrogen storage cylinder or a hydrogen storage tank, etc.

[0060] The following will further elaborate and explain the present utility model through specific embodiments. It should be noted that the following embodiments are only illustrative and not used to limit the present utility model. Based on the embodiments of the present utility model shown below, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the embodiments of the present utility model.

[0061] Specific experimental means

[0062] 1. The degree of collision wear and powdering of various shapes and sizes

[0063] Coefficient of friction: The ratio of the frictional force between two surfaces to the vertical force acting on one of the surfaces. The higher the height and the larger the diameter of the magnesium cake (magnesium ingot), the greater the coefficient of friction, the less likely the magnesium cake is to slide, and the fewer the number of collisions. Refer to "Test Method for Coefficient of Friction of Thin Sheets and Strips of Metallic Materials", standard number YB∕T4286-2012.

[0064] The solid-state hydrogen storage magnesium ingot expands during the hydrogen absorption process, generating expansion stress in the material, which in turn leads to the initiation of cracks in the material, causing the material to break or even powder. Collisions during the transportation of the material may cause the cracks in the material to expand, exacerbating the breakage and powdering of the material. The degree of material breakage and powdering can be tested by the weighing method.

[0065] 2. Hydrogen charging and discharging rates

[0066] The hydrogen charging and discharging rates can be tested by a Sieverts device to measure the mass of hydrogen charging and discharging per unit mass of the material per unit time. The test process can refer to the national standard "Rare Earth-Based Hydrogen Storage Alloys for Solid-State Hydrogen Storage", standard number GB / T 44754-2024. For materials with larger sizes, their hydrogen charging and discharging rates are related to heat transfer and mass transfer.

[0067] 3. Radial thermal resistance and axial thermal resistance

[0068] Axial thermal conduction resistance , where is the heat transfer distance, is the thermal conductivity, is the area. The larger the size of the magnesium cake, the longer the heat transfer distance, and the greater the thermal resistance, resulting in slower heat transfer. It can be tested by an interfacial material thermal conductivity and thermal resistance measuring instrument.

[0069] Radial thermal conduction thermal resistance 。

[0070] 4. Gas pressure drop between main surfaces per unit area

[0071] The gas pressure drop between the main surfaces per unit area represents the ease of gas diffusion within the material. The farther the distance between the two main surfaces of the magnesium cake, the greater the gas pressure drop, indicating that it is more difficult for gas to reach the interior of the material. It can be tested using a permeability testing instrument.

[0072] 5. Hydrogen storage density per unit volume

[0073] The volumetric hydrogen storage density is related to the manufacturing process of the magnesium cake (magnesium ingot). Assuming the magnesium cake is formed by a briquetting machine, the greater the pressing pressure, the greater the volumetric hydrogen storage density. The volumetric hydrogen storage density can be measured by testing the hydrogen storage capacity using a Sieverts device and then dividing by the volume.

[0074] 6. Density uniformity

[0075] The density of the block is uniform, and the properties of the block are more homogeneous. The smaller the height of the block, the smaller the density difference of the block; the larger the diameter of the block, the smaller the density difference of the block. To ensure density uniformity, the height-to-diameter ratio of the block should be reduced. The density of the briquette can be obtained by cutting the block along the axial direction, measuring the hardness distribution on the cross-section, and then converting the hardness value into density through a standard curve.

[0076] Specific experimental steps

[0077] Example 1

[0078] The solid-state hydrogen storage magnesium ingot in this example is a square column, with the main surface being square, the diameter of the minimum circumscribed circle being 6 cm, and the thickness being 1 cm. A through-hole with a diameter of 1 cm is formed in the center of the main surface.

[0079] Examples 2 - 14

[0080] The specific scheme is the same as that of Example 1, except that the parameters shown in Table 1 below are different, and the solid-state hydrogen storage magnesium ingots in Examples 1 - 12 are made of magnesium-nickel alloy, while the solid-state hydrogen storage magnesium ingots in Examples 13 and 14 are made of magnesium-rare earth alloy.

[0081] The specific experimental data (partially using simulation data) of the above Examples 1 - 14 are also shown in Table 1 below.

[0082] Table 1 Specific parameter settings and experimental (simulation) results of Examples 1 - 14

[0083]

[0084] Comparative Examples 1 - 10

[0085] The specific solution is as in Example 1, with the only differences being that the parameters in Table 2 below are different, and the solid-state hydrogen storage magnesium ingots in Comparative Examples 1-9 use magnesium-nickel alloys, and the solid-state hydrogen storage magnesium ingots in Comparative Example 10 use magnesium-rare earth alloys.

[0086] The specific experimental data (partially using simulation data) of the above Comparative Examples 1-10 are also shown in Table 2 below.

[0087] Table 2 Specific parameter settings and experimental (simulation) results of Comparative Examples 1-10

[0088]

[0089] Through the above comparative studies, it can be found that although traditional powdered solid-state hydrogen storage materials have a high hydrogen charging and discharging rate, they are very easy to move after being powdered, resulting in potential safety hazards and loss of effective hydrogen storage media, and also do not meet transportation specifications. Solid-state hydrogen storage materials with a minimum circumscribed circle diameter less than 5 cm and greater than 30 cm, or without a through-hole structure, are inferior to the shape and size designed by the present utility model in terms of hydrogen charging and discharging rate and friction stability (safety). Further experimental studies also show that by limiting the numerical ranges of the diameter and thickness, and the proportion of the through-holes in the main surface, and cooperating with the design of the hole shape and distribution of the air outlet holes on the hydrogen storage device limiting air guide rod, without considering the specific material of the hydrogen storage medium, only through the shape and structure design, the hydrogen charging and discharging rate and hydrogen storage density can be further improved while ensuring safety.

[0090] In the description of the present utility model, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In the present utility model, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in the present utility model and the features of different embodiments or examples.

[0091] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the embodiments of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0092] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A solid-state hydrogen storage magnesium ingot, characterized in that: It has two main surfaces opposite to each other, and the diameters of the minimum circumscribed circles of the two main surfaces are both in the range of 6 to 25 cm; The thickness is in the range of 1 to 5 cm; One or more through holes are formed between the two main surfaces, and at least one main hole is included in the one or more through holes. The proportion of the area of the main hole in the total area of the main surface where it is located is 1% to 25%.

2. The solid-state hydrogen storage magnesium ingot according to claim 1, characterized in that, The solid-state hydrogen storage magnesium ingot is a vehicle-mounted, ship-mounted or aircraft-mounted solid-state hydrogen storage magnesium ingot, meeting the relevant transportation regulations; and / or The aspect ratio of the solid-state hydrogen storage magnesium ingot is in the range of 0.04 to 0.33; and / or One or more through holes or blind holes are formed in the radial direction of the at least one main hole.

3. The solid-state hydrogen storage magnesium ingot according to claim 2, characterized in that, At least one of the two main surfaces of the solid-state hydrogen storage magnesium ingot has a shape conforming to axial symmetry, rotational symmetry or central symmetry.

4. The solid-state hydrogen storage magnesium ingot according to claim 3, wherein, The shapes of the two main surfaces of the solid-state hydrogen storage magnesium ingot are each selected from regular polygons, racetrack shapes, circles or ellipses.

5. The solid-state hydrogen storage magnesium ingot according to claim 2, characterized in that The diameters of the minimum circumscribed circles of the two main surfaces of the solid-state hydrogen storage magnesium ingot are both in the range of 6 to 20 cm; and / or The thickness of the solid-state hydrogen storage magnesium ingot is in the range of 1.5 to 4.5 cm.

6. The solid-state hydrogen storage magnesium ingot according to claim 5, characterized in that The diameters of the minimum circumscribed circles of the two main surfaces of the solid-state hydrogen storage magnesium ingot are both in the range of 8 to 15 cm; and / or The thickness of the solid-state hydrogen storage magnesium ingot is in the range of 2 to 4 cm.

7. The solid-state hydrogen storage magnesium ingot according to claim 1, characterized in that, The two main surfaces of the solid-state hydrogen storage magnesium ingot are flat.

8. The solid-state hydrogen storage magnesium ingot according to claim 1, wherein The two main surfaces of the solid-state hydrogen storage magnesium ingot have a concave-convex or wavy structure.

9. The solid-state hydrogen storage magnesium ingot according to claim 1, wherein, The solid-state hydrogen storage magnesium ingots can be stacked in the axial direction.

10. A hydrogen storage device using the solid-state hydrogen storage magnesium ingot according to any one of claims 1-9 as a hydrogen storage medium.

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